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Category:   Application (Forum/Board/Portal)  >   WordPress Vendors:   wordpress.org
WordPress Input Validation Flaw in wp_check_filetype() Lets Remote Authenticated Users With Upload Privileges Upload Arbitrary Files
SecurityTracker Alert ID:  1032555
SecurityTracker URL:  http://securitytracker.com/id/1032555
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jun 10 2015
Impact:   Execution of arbitrary code via network, Modification of system information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.1.1 and prior
Description:   A vulnerability was reported in WordPress. A remote authenticated user can upload arbitrary files and potentially execute arbitrary code on the target system in certain cases.

A remote authenticated user with file upload privileges can exploit a flaw in the wp_check_filetype() in '/wp-includes/functions.php' in the processing of specially crafted regular expressions to upload files with arbitrary file names. This can be exploited to execute arbitrary code on the target system with the privileges of the target web service.

Michael Kapfer and Sebastian Kraemer of HSASec reported this vulnerability.

Impact:   A remote authenticated user with file upload privileges can upload arbitrary files and potentially execute arbitrary code on the target system.
Solution:   The vendor has issued a fix (4.1.2) [in April 2015].

https://wordpress.org/news/2015/04/wordpress-4-1-2/

Vendor URL:  wordpress.org/news/2015/04/wordpress-4-1-2/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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